Device security plate



FIG. 1 is a front elevational view of a device security plate showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top perspective view thereof; and,

FIG. 5 is a bottom perspective view thereof.

The broken lines environment is for illustrative purpose only and forms no part of the claimed design. 

The ornamental design for a device security plate, as shown and described. 